Synonyms: 2-Naphthalenesulfonic acid, 4-hydroxy-7-((((5-hydroxy-7-sulfo-2-naphthalenyl)amino)carbonyl)amino)-3-(2-(2-methyl-4-sulfophenyl)diazenyl)-, compd. with 2,2'-iminobis(ethanol) (1:3);4-Hydroxy-7-((((5-hydroxy-7-sulfo-2-naphthalenyl)amino)carbonyl)amino)-3-((2-methyl-4-sulfophenyl)azo)-2-naphthalenesulfonic acid, diethanolamine salt (1:3);2-Naphthalenesulfonic acid, 4-hydroxy-7-((((5-hydroxy-7-sulfo-2-naphthalenyl)amino)carbonyl)amino)-3-((2-methyl-4-sulfophenyl)azo)-, compd. with 2,2'-iminobis(ethanol) (1:3);4-Hydroxy-7-((((5-hydroxy-7-sulpho-2-naphthyl)amino)carbonyl)amino)-3-((2-methyl-4-sulphophenyl)azo)naphthalene-2-sulphonic acid, compound with 2,2'-iminobis(ethanol) (1:3);4-hydroxy-7-[({(6E)-6-[2-(2-methyl-4-sulfophenyl)hydrazinylidene]-5-oxo-7-sulfo-5,6-dihydronaphthalen-2-yl}carbamoyl)amino]naphthalene-2-sulfonic acid - 2,2'-iminodiethanol (1:3)